When referring to snap switches rated at 30 Amps, what should their over-current protection not exceed?

When dealing with snap switches rated for 30 Amps, the maximum allowable over-current protection that should be used is critical to ensure safety and compliance with electrical codes. The appropriate over-current protection for devices rated at 30 Amps is typically set at a value that is significantly higher than the device's rated capacity to prevent nuisance tripping, yet still within safe limits to mitigate the risk of overload.

In this context, 200 Amps as the maximum over-current protection is appropriate. This value ensures that while the switch can handle a substantial load, it does so within parameters that align with electrical standards governing safety. The code specifies that the over-current protection should not exceed five times the rating of the switch under normal operating conditions.

For a 30 Amp switch, this would ideally be set to values that provide a buffer while remaining within safe operational ranges. Therefore, while the other higher values would indicate potential misalignment with safety standards, setting the protection at 200 Amps reflects adherence to best practices in electrical engineering and safety regulations.